How to Melt Ice Dams on the Roof
Ice dams occur when snow lies on a roof and heat from the attic space escapes and melts the snow. The water flows under the snow into gutters and along eaves and refreezes. Ice can lift up edges of the roofing shingles, allowing an entry point for snow, ice and water. Ice damages roofing shingles by adhering to the tiny pebbles and the weight of the ice pulls the rough surface off the shingles, shortening the life of the roof. Icicles generally form and dangle from gutters and eaves due to ice dams, creating a danger to people on the ground. Does this Spark an idea?
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Instructions
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Push excess snow off the roof with a roof rake or long-handled broom if you can reach the snow buildup from the ground. Do not use a ladder or climb onto a roof with a snow or ice accumulation.
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Fill a knee-high stocking or mesh bag with calcium chloride or purchase calcium chloride tablets. Do not use sodium chloride; sodium chloride is corrosive and will damage the roofing materials.
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Throw the ice melting bags or tablets onto the roof on top of the ice dams. Attempt to position the calcium chloride every 12 to 24 inches across the roof line.
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Tips & Warnings
Install heating cables along the eaves and into gutters to prevent ice dams.
Adequately insulate your attic and provide proper ventilation to avoid ice formation.
References
Resources
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